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(No Model.) I

J. C. BLEVNEY MAVGHINE FOR PULVERIZING ORES, &c.

No. 309,188. Patented Dec. 16,1884. 7

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JOHN C. BLEVNEY, OF NEXVARK, NEW JERSEY.

MACHINE FOR PULVERIZING ORES, 81,0.

SPECIFICATION forming part of Letters Patent No. 309,188, dated December16,1884.

Application filed January 26, 1-984.

T0 aZZ whom it may concern:

Be it known that I, J OHN C. BLEVNEY, a citizen of the United States,and a resident of the city of Newark, in the county of Essex and Stateof New Jersey, have invented certain new and useful Improvements inMachines for Pulverizing Ores, &c., of which the following is aspecification.

The object of my invention is to provide a mill for pulverizing ores andother substances, in which the larger pieces will be reduced bybreakers, and the mass of ore be partly-pulverized by grindingsurfacescomposed of the ores themselves, and finally ground between smoothmetallic grinding-surl'aees.

In the accompanying drawings, Figure 1 is a partial central sectionalview on lineg h, Fig. 2, of a mill embodying my invention; and Fig. 2, aplan view of the same.

A indicates the casing of my mill, and B the shaft thereof.

Between two sections of the casing A is secured the stationarygrindingring O by a rabbeted flange, c. This ring 0 is provided with aseries of inward-projecting ribs or breakers, c.

l) is the rotary grindingring, which is fixed to the shalt 1; Theadjacent or grind ing faces of the rings 0 and D are smooth and inclinedrelative to each other, and, preferably, to a horizontal plane, as shownin Fig.1, so that the space between them gradually de- Instead of havingboth of these rings inclined relative to the horizontal plane, as shown,one of the faces might be horizontal and the other slightly inclinedrelative thereto, to form the tapering space between them; but thearrangement shown is deemed preferable for the reason that thecentrifugal force which serves to ex pel the material outward betweenthe grinding-faces will be assisted by gravity when such arrangement isemployed. The ring D is formed with an annular recess, (forlightness intransportation,) and with a series of radial ribs or breakers, d, which,with the disk d, form a series of pockets, open toward the periphery ofthe wheel. The grinding-rim of the said ring is extended inward as faras the insides of the ribs 0 on the stationary ring 0, so as to serve asa bottom for the inwardlyopening pockets formed by said ribs 0.

(X0 model.)

The material to be pulverized enters the mill from above, and, fillingthe pockets in the upper side of the ring D, is forced outward into thestationary pockets between the ribs 0 and the ring C. Thus the materialmoving with the ring D will be rubbed against the stationary material inthe pockets of the ring 0, the two masses of material thus forminggrinding-surfaces for its reduction. The larger pieces of material willbe caught and broken between the stationary and rotating and desire tosecure by Letters Patent- 1. The combination, with a stationarygrinding-ring having a smooth grinding-surface and a series ofinwardly-projecting ribs, of a rotary grinding-ring having a series ofradial ribs within the ribs of the stationary ring, and a smoothgrindingsurfacc adjacent to the grin ding-surface of said stationaryring, substantially as set forth.

2. The combination, with a stationary grinding-ringhaving agrinding-surface and a series of inwardlyprojecting ribs, of a rotarygrindingring arranged partly within and partly below said stationaryring, and having a series of radial ribs within the ribs of thestationary ring, and a grinding-surface below the grindingsurface of thestationary ring, which extends inward below the inwardlyprojeeiing ribson the latter, substantially as set to th.

In testimony that I claim the foregoing as my invention I have signed myname,in presence of two witnesses, this 24th day of January, 1881.

JOHN G. JBLEVNEY.

Witnesses:

MARY H. BLEVNEY, GEORGE H. VINCENT.

